Monthly outlook for Hartmantown, TN: average high 82.9°, average low 64.7°. That is 0.8° above the climate normal for August. Precipitation is expected on 13 days (about 4.5 inches), against a normal of 6 days and 1.7 inches. The warmest day looks like 12 August (91.3°), the coolest 22 August (58.5°).
82.9°/64.7°
Average high / low
+0.8°
Above normal
13 / 6
Wet days / normal
4.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
84.1°
81.5°
+1.4°
19 August – 28 August
80.9°
81.5°
-0.3°
29 August – 7 September
at normal
80.1°
—
August records over 66 years
96.6°16 August 2007All-time high
46.9°29 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Johnson City (11 mi).
Mon, 1081° / 68°0.14
81 °
Hartmantown, Monday, 10 August
Light rain. High 81°, low 68°.
Pressure30.15 inHg
Wind6.4 mph W
Humidity63%
Visibility6.2 mi
Dew point67°
Tue, 1185° / 66°0.05
85 °
Hartmantown, Tuesday, 11 August
Light rain. High 85°, low 66°.
Pressure30.09 inHg
Wind6.6 mph W
Humidity66%
Visibility6.2 mi
Dew point69°
Wed, 1291° / 63°1.39
91 °
Hartmantown, Wednesday, 12 August
Heavy rain. High 91°, low 63°.
Pressure29.94 inHg
Wind12.1 mph W
Humidity63%
Visibility6.2 mi
Dew point70°
Thu, 1382° / 62°0.32
82 °
Hartmantown, Thursday, 13 August
Rain. High 82°, low 62°.
Pressure30.00 inHg
Wind8.9 mph W
Humidity68%
Visibility—
Dew point68°
Fri, 1480° / 68°0.77
80 °
Hartmantown, Friday, 14 August
Rain. High 80°, low 68°.
Pressure30.12 inHg
Wind6.4 mph W
Humidity96%
Visibility—
Dew point69°
Sat, 1581° / 67°0.41
81 °
Hartmantown, Saturday, 15 August
Rain. High 81°, low 67°.
Pressure30.18 inHg
Wind5.1 mph NW
Humidity74%
Visibility—
Dew point70°
Sun, 1688° / 65°0.04
88 °
Hartmantown, Sunday, 16 August
Light rain. High 88°, low 65°.
Pressure30.09 inHg
Wind8.5 mph SW
Humidity64%
Visibility—
Dew point70°
Mon, 1787° / 69°0.47
87 °
Hartmantown, Monday, 17 August
Rain. High 87°, low 69°.
Pressure29.97 inHg
Wind11 mph W
Humidity62%
Visibility—
Dew point69°
Tue, 1885° / 62°0
85 °
Hartmantown, Tuesday, 18 August
Partly cloudy. High 85°, low 62°.
Pressure29.94 inHg
Wind8.3 mph W
Humidity55%
Visibility—
Dew point62°
Wed, 1985° / 66°0.25
85 °
Hartmantown, Wednesday, 19 August
Rain. High 85°, low 66°.
Pressure29.85 inHg
Wind15.4 mph W
Humidity59%
Visibility—
Dew point65°
Thu, 2079° / 68°0.39
79 °
Hartmantown, Thursday, 20 August
Light rain. High 79°, low 68°.
Pressure29.85 inHg
Wind10.8 mph SW
Humidity88%
Visibility—
Dew point70°
Fri, 2178° / 60°0
78 °
Hartmantown, Friday, 21 August
Clear. High 78°, low 60°.
Pressure29.94 inHg
Wind5.3 mph SW
Humidity52%
Visibility—
Dew point57°
Sat, 2279° / 58°0.09
79 °
Hartmantown, Saturday, 22 August
Light rain. High 79°, low 58°.
Pressure29.97 inHg
Wind8.8 mph S
Humidity77%
Visibility—
Dew point64°
Sun, 2381° / 65°0.05
81 °
Hartmantown, Sunday, 23 August
Light rain. High 81°, low 65°.
Pressure30.03 inHg
Wind8.7 mph W
Humidity64%
Visibility—
Dew point65°
Mon, 2483° / 61°0
83 °
Hartmantown, Monday, 24 August
Light rain. High 83°, low 61°.
Pressure30.09 inHg
Wind5.7 mph NE
Humidity52%
Visibility—
Dew point61°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2582° / 64°0.07
82 °
Hartmantown, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high82°
Average low64°
Average precipitation0.07 in
Chance of precipitation25%
Record high93° (2023)
Record low56° (2013)
Wed, 2682° / 63°0.07
82 °
Hartmantown, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high82°
Average low63°
Average precipitation0.07 in
Chance of precipitation27%
Record high92° (2016)
Record low55° (2015)
Thu, 2782° / 64°0.15
82 °
Hartmantown, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high82°
Average low64°
Average precipitation0.15 in
Chance of precipitation38%
Record high91° (2016)
Record low53° (1968)
Fri, 2882° / 64°0.08
82 °
Hartmantown, Friday, 28 August
Climate normal for this date — 60-year average.
Average high82°
Average low64°
Average precipitation0.08 in
Chance of precipitation32%
Record high91° (2021)
Record low52° (1968)
Sat, 2982° / 63°0.06
82 °
Hartmantown, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high82°
Average low63°
Average precipitation0.06 in
Chance of precipitation28%
Record high92° (2024)
Record low47° (1986)
Sun, 3082° / 63°0.06
82 °
Hartmantown, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high82°
Average low63°
Average precipitation0.06 in
Chance of precipitation38%
Record high94° (2024)
Record low49° (1986)
Mon, 3181° / 64°0.1
81 °
Hartmantown, Monday, 31 August
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.1 in
Chance of precipitation43%
Record high90° (2024)
Record low52° (1976)
Tue, 0180° / 63°0.15
80 °
Hartmantown, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.15 in
Chance of precipitation40%
Record high90° (1973)
Record low52° (1999)
Wed, 0280° / 63°0.08
80 °
Hartmantown, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.08 in
Chance of precipitation35%
Record high91° (2011)
Record low49° (1967)
Thu, 0380° / 62°0.1
80 °
Hartmantown, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high80°
Average low62°
Average precipitation0.1 in
Chance of precipitation42%
Record high93° (2011)
Record low49° (1967)
Fri, 0479° / 62°0.15
79 °
Hartmantown, Friday, 4 September
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.15 in
Chance of precipitation38%
Record high92° (2019)
Record low50° (1997)
Sat, 0579° / 62°0.17
79 °
Hartmantown, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.17 in
Chance of precipitation40%
Record high91° (1975)
Record low47° (1997)
Sun, 0679° / 62°0.12
79 °
Hartmantown, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.12 in
Chance of precipitation38%
Record high89° (2023)
Record low51° (1984)
Mon, 0779° / 61°0.11
79 °
Hartmantown, Monday, 7 September
Climate normal for this date — 60-year average.
Average high79°
Average low61°
Average precipitation0.11 in
Chance of precipitation32%
Record high91° (1990)
Record low49° (2017)
About the monthly outlook
How accurate is a 30-day forecast?
The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Hartmantown, TN are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
What does "above normal" mean?
We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.
Where do the 66-year records come from?
They are real temperature extremes recorded in Hartmantown, TN since 1960: the highest and lowest reading for each calendar date, with the year it happened.
How often is it updated?
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.